--- /dev/null
+/* gzwrite.c -- zlib functions for writing gzip files\r
+ * Copyright (C) 2004, 2005, 2010, 2011, 2012, 2013 Mark Adler\r
+ * For conditions of distribution and use, see copyright notice in zlib.h\r
+ */\r
+\r
+#include "gzguts.h"\r
+\r
+/* Local functions */\r
+local int gz_init OF((gz_statep));\r
+local int gz_comp OF((gz_statep, int));\r
+local int gz_zero OF((gz_statep, z_off64_t));\r
+\r
+/* Initialize state for writing a gzip file. Mark initialization by setting\r
+ state->size to non-zero. Return -1 on failure or 0 on success. */\r
+local int gz_init(state)\r
+ gz_statep state;\r
+{\r
+ int ret;\r
+ z_streamp strm = &(state->strm);\r
+\r
+ /* allocate input buffer */\r
+ state->in = (unsigned char *)malloc(state->want);\r
+ if (state->in == NULL) {\r
+ gz_error(state, Z_MEM_ERROR, "out of memory");\r
+ return -1;\r
+ }\r
+\r
+ /* only need output buffer and deflate state if compressing */\r
+ if (!state->direct) {\r
+ /* allocate output buffer */\r
+ state->out = (unsigned char *)malloc(state->want);\r
+ if (state->out == NULL) {\r
+ free(state->in);\r
+ gz_error(state, Z_MEM_ERROR, "out of memory");\r
+ return -1;\r
+ }\r
+\r
+ /* allocate deflate memory, set up for gzip compression */\r
+ strm->zalloc = Z_NULL;\r
+ strm->zfree = Z_NULL;\r
+ strm->opaque = Z_NULL;\r
+ ret = deflateInit2(strm, state->level, Z_DEFLATED,\r
+ MAX_WBITS + 16, DEF_MEM_LEVEL, state->strategy);\r
+ if (ret != Z_OK) {\r
+ free(state->out);\r
+ free(state->in);\r
+ gz_error(state, Z_MEM_ERROR, "out of memory");\r
+ return -1;\r
+ }\r
+ }\r
+\r
+ /* mark state as initialized */\r
+ state->size = state->want;\r
+\r
+ /* initialize write buffer if compressing */\r
+ if (!state->direct) {\r
+ strm->avail_out = state->size;\r
+ strm->next_out = state->out;\r
+ state->x.next = strm->next_out;\r
+ }\r
+ return 0;\r
+}\r
+\r
+/* Compress whatever is at avail_in and next_in and write to the output file.\r
+ Return -1 if there is an error writing to the output file, otherwise 0.\r
+ flush is assumed to be a valid deflate() flush value. If flush is Z_FINISH,\r
+ then the deflate() state is reset to start a new gzip stream. If gz->direct\r
+ is true, then simply write to the output file without compressing, and\r
+ ignore flush. */\r
+local int gz_comp(state, flush)\r
+ gz_statep state;\r
+ int flush;\r
+{\r
+ int ret, got;\r
+ unsigned have;\r
+ z_streamp strm = &(state->strm);\r
+\r
+ /* allocate memory if this is the first time through */\r
+ if (state->size == 0 && gz_init(state) == -1)\r
+ return -1;\r
+\r
+ /* write directly if requested */\r
+ if (state->direct) {\r
+ got = write(state->fd, strm->next_in, strm->avail_in);\r
+ if (got < 0 || (unsigned)got != strm->avail_in) {\r
+ gz_error(state, Z_ERRNO, zstrerror());\r
+ return -1;\r
+ }\r
+ strm->avail_in = 0;\r
+ return 0;\r
+ }\r
+\r
+ /* run deflate() on provided input until it produces no more output */\r
+ ret = Z_OK;\r
+ do {\r
+ /* write out current buffer contents if full, or if flushing, but if\r
+ doing Z_FINISH then don't write until we get to Z_STREAM_END */\r
+ if (strm->avail_out == 0 || (flush != Z_NO_FLUSH &&\r
+ (flush != Z_FINISH || ret == Z_STREAM_END))) {\r
+ have = (unsigned)(strm->next_out - state->x.next);\r
+ if (have && ((got = write(state->fd, state->x.next, have)) < 0 ||\r
+ (unsigned)got != have)) {\r
+ gz_error(state, Z_ERRNO, zstrerror());\r
+ return -1;\r
+ }\r
+ if (strm->avail_out == 0) {\r
+ strm->avail_out = state->size;\r
+ strm->next_out = state->out;\r
+ }\r
+ state->x.next = strm->next_out;\r
+ }\r
+\r
+ /* compress */\r
+ have = strm->avail_out;\r
+ ret = deflate(strm, flush);\r
+ if (ret == Z_STREAM_ERROR) {\r
+ gz_error(state, Z_STREAM_ERROR,\r
+ "internal error: deflate stream corrupt");\r
+ return -1;\r
+ }\r
+ have -= strm->avail_out;\r
+ } while (have);\r
+\r
+ /* if that completed a deflate stream, allow another to start */\r
+ if (flush == Z_FINISH)\r
+ deflateReset(strm);\r
+\r
+ /* all done, no errors */\r
+ return 0;\r
+}\r
+\r
+/* Compress len zeros to output. Return -1 on error, 0 on success. */\r
+local int gz_zero(state, len)\r
+ gz_statep state;\r
+ z_off64_t len;\r
+{\r
+ int first;\r
+ unsigned n;\r
+ z_streamp strm = &(state->strm);\r
+\r
+ /* consume whatever's left in the input buffer */\r
+ if (strm->avail_in && gz_comp(state, Z_NO_FLUSH) == -1)\r
+ return -1;\r
+\r
+ /* compress len zeros (len guaranteed > 0) */\r
+ first = 1;\r
+ while (len) {\r
+ n = GT_OFF(state->size) || (z_off64_t)state->size > len ?\r
+ (unsigned)len : state->size;\r
+ if (first) {\r
+ memset(state->in, 0, n);\r
+ first = 0;\r
+ }\r
+ strm->avail_in = n;\r
+ strm->next_in = state->in;\r
+ state->x.pos += n;\r
+ if (gz_comp(state, Z_NO_FLUSH) == -1)\r
+ return -1;\r
+ len -= n;\r
+ }\r
+ return 0;\r
+}\r
+\r
+/* -- see zlib.h -- */\r
+int ZEXPORT gzwrite(file, buf, len)\r
+ gzFile file;\r
+ voidpc buf;\r
+ unsigned len;\r
+{\r
+ unsigned put = len;\r
+ gz_statep state;\r
+ z_streamp strm;\r
+\r
+ /* get internal structure */\r
+ if (file == NULL)\r
+ return 0;\r
+ state = (gz_statep)file;\r
+ strm = &(state->strm);\r
+\r
+ /* check that we're writing and that there's no error */\r
+ if (state->mode != GZ_WRITE || state->err != Z_OK)\r
+ return 0;\r
+\r
+ /* since an int is returned, make sure len fits in one, otherwise return\r
+ with an error (this avoids the flaw in the interface) */\r
+ if ((int)len < 0) {\r
+ gz_error(state, Z_DATA_ERROR, "requested length does not fit in int");\r
+ return 0;\r
+ }\r
+\r
+ /* if len is zero, avoid unnecessary operations */\r
+ if (len == 0)\r
+ return 0;\r
+\r
+ /* allocate memory if this is the first time through */\r
+ if (state->size == 0 && gz_init(state) == -1)\r
+ return 0;\r
+\r
+ /* check for seek request */\r
+ if (state->seek) {\r
+ state->seek = 0;\r
+ if (gz_zero(state, state->skip) == -1)\r
+ return 0;\r
+ }\r
+\r
+ /* for small len, copy to input buffer, otherwise compress directly */\r
+ if (len < state->size) {\r
+ /* copy to input buffer, compress when full */\r
+ do {\r
+ unsigned have, copy;\r
+\r
+ if (strm->avail_in == 0)\r
+ strm->next_in = state->in;\r
+ have = (unsigned)((strm->next_in + strm->avail_in) - state->in);\r
+ copy = state->size - have;\r
+ if (copy > len)\r
+ copy = len;\r
+ memcpy(state->in + have, buf, copy);\r
+ strm->avail_in += copy;\r
+ state->x.pos += copy;\r
+ buf = (const char *)buf + copy;\r
+ len -= copy;\r
+ if (len && gz_comp(state, Z_NO_FLUSH) == -1)\r
+ return 0;\r
+ } while (len);\r
+ }\r
+ else {\r
+ /* consume whatever's left in the input buffer */\r
+ if (strm->avail_in && gz_comp(state, Z_NO_FLUSH) == -1)\r
+ return 0;\r
+\r
+ /* directly compress user buffer to file */\r
+ strm->avail_in = len;\r
+ strm->next_in = (z_const Bytef *)buf;\r
+ state->x.pos += len;\r
+ if (gz_comp(state, Z_NO_FLUSH) == -1)\r
+ return 0;\r
+ }\r
+\r
+ /* input was all buffered or compressed (put will fit in int) */\r
+ return (int)put;\r
+}\r
+\r
+/* -- see zlib.h -- */\r
+int ZEXPORT gzputc(file, c)\r
+ gzFile file;\r
+ int c;\r
+{\r
+ unsigned have;\r
+ unsigned char buf[1];\r
+ gz_statep state;\r
+ z_streamp strm;\r
+\r
+ /* get internal structure */\r
+ if (file == NULL)\r
+ return -1;\r
+ state = (gz_statep)file;\r
+ strm = &(state->strm);\r
+\r
+ /* check that we're writing and that there's no error */\r
+ if (state->mode != GZ_WRITE || state->err != Z_OK)\r
+ return -1;\r
+\r
+ /* check for seek request */\r
+ if (state->seek) {\r
+ state->seek = 0;\r
+ if (gz_zero(state, state->skip) == -1)\r
+ return -1;\r
+ }\r
+\r
+ /* try writing to input buffer for speed (state->size == 0 if buffer not\r
+ initialized) */\r
+ if (state->size) {\r
+ if (strm->avail_in == 0)\r
+ strm->next_in = state->in;\r
+ have = (unsigned)((strm->next_in + strm->avail_in) - state->in);\r
+ if (have < state->size) {\r
+ state->in[have] = c;\r
+ strm->avail_in++;\r
+ state->x.pos++;\r
+ return c & 0xff;\r
+ }\r
+ }\r
+\r
+ /* no room in buffer or not initialized, use gz_write() */\r
+ buf[0] = c;\r
+ if (gzwrite(file, buf, 1) != 1)\r
+ return -1;\r
+ return c & 0xff;\r
+}\r
+\r
+/* -- see zlib.h -- */\r
+int ZEXPORT gzputs(file, str)\r
+ gzFile file;\r
+ const char *str;\r
+{\r
+ int ret;\r
+ unsigned len;\r
+\r
+ /* write string */\r
+ len = (unsigned)strlen(str);\r
+ ret = gzwrite(file, str, len);\r
+ return ret == 0 && len != 0 ? -1 : ret;\r
+}\r
+\r
+#if defined(STDC) || defined(Z_HAVE_STDARG_H)\r
+#include <stdarg.h>\r
+\r
+/* -- see zlib.h -- */\r
+int ZEXPORTVA gzvprintf(gzFile file, const char *format, va_list va)\r
+{\r
+ int size, len;\r
+ gz_statep state;\r
+ z_streamp strm;\r
+\r
+ /* get internal structure */\r
+ if (file == NULL)\r
+ return -1;\r
+ state = (gz_statep)file;\r
+ strm = &(state->strm);\r
+\r
+ /* check that we're writing and that there's no error */\r
+ if (state->mode != GZ_WRITE || state->err != Z_OK)\r
+ return 0;\r
+\r
+ /* make sure we have some buffer space */\r
+ if (state->size == 0 && gz_init(state) == -1)\r
+ return 0;\r
+\r
+ /* check for seek request */\r
+ if (state->seek) {\r
+ state->seek = 0;\r
+ if (gz_zero(state, state->skip) == -1)\r
+ return 0;\r
+ }\r
+\r
+ /* consume whatever's left in the input buffer */\r
+ if (strm->avail_in && gz_comp(state, Z_NO_FLUSH) == -1)\r
+ return 0;\r
+\r
+ /* do the printf() into the input buffer, put length in len */\r
+ size = (int)(state->size);\r
+ state->in[size - 1] = 0;\r
+#ifdef NO_vsnprintf\r
+# ifdef HAS_vsprintf_void\r
+ (void)vsprintf((char *)(state->in), format, va);\r
+ for (len = 0; len < size; len++)\r
+ if (state->in[len] == 0) break;\r
+# else\r
+ len = vsprintf((char *)(state->in), format, va);\r
+# endif\r
+#else\r
+# ifdef HAS_vsnprintf_void\r
+ (void)vsnprintf((char *)(state->in), size, format, va);\r
+ len = strlen((char *)(state->in));\r
+# else\r
+ len = vsnprintf((char *)(state->in), size, format, va);\r
+# endif\r
+#endif\r
+\r
+ /* check that printf() results fit in buffer */\r
+ if (len <= 0 || len >= (int)size || state->in[size - 1] != 0)\r
+ return 0;\r
+\r
+ /* update buffer and position, defer compression until needed */\r
+ strm->avail_in = (unsigned)len;\r
+ strm->next_in = state->in;\r
+ state->x.pos += len;\r
+ return len;\r
+}\r
+\r
+int ZEXPORTVA gzprintf(gzFile file, const char *format, ...)\r
+{\r
+ va_list va;\r
+ int ret;\r
+\r
+ va_start(va, format);\r
+ ret = gzvprintf(file, format, va);\r
+ va_end(va);\r
+ return ret;\r
+}\r
+\r
+#else /* !STDC && !Z_HAVE_STDARG_H */\r
+\r
+/* -- see zlib.h -- */\r
+int ZEXPORTVA gzprintf (file, format, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10,\r
+ a11, a12, a13, a14, a15, a16, a17, a18, a19, a20)\r
+ gzFile file;\r
+ const char *format;\r
+ int a1, a2, a3, a4, a5, a6, a7, a8, a9, a10,\r
+ a11, a12, a13, a14, a15, a16, a17, a18, a19, a20;\r
+{\r
+ int size, len;\r
+ gz_statep state;\r
+ z_streamp strm;\r
+\r
+ /* get internal structure */\r
+ if (file == NULL)\r
+ return -1;\r
+ state = (gz_statep)file;\r
+ strm = &(state->strm);\r
+\r
+ /* check that can really pass pointer in ints */\r
+ if (sizeof(int) != sizeof(void *))\r
+ return 0;\r
+\r
+ /* check that we're writing and that there's no error */\r
+ if (state->mode != GZ_WRITE || state->err != Z_OK)\r
+ return 0;\r
+\r
+ /* make sure we have some buffer space */\r
+ if (state->size == 0 && gz_init(state) == -1)\r
+ return 0;\r
+\r
+ /* check for seek request */\r
+ if (state->seek) {\r
+ state->seek = 0;\r
+ if (gz_zero(state, state->skip) == -1)\r
+ return 0;\r
+ }\r
+\r
+ /* consume whatever's left in the input buffer */\r
+ if (strm->avail_in && gz_comp(state, Z_NO_FLUSH) == -1)\r
+ return 0;\r
+\r
+ /* do the printf() into the input buffer, put length in len */\r
+ size = (int)(state->size);\r
+ state->in[size - 1] = 0;\r
+#ifdef NO_snprintf\r
+# ifdef HAS_sprintf_void\r
+ sprintf((char *)(state->in), format, a1, a2, a3, a4, a5, a6, a7, a8,\r
+ a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20);\r
+ for (len = 0; len < size; len++)\r
+ if (state->in[len] == 0) break;\r
+# else\r
+ len = sprintf((char *)(state->in), format, a1, a2, a3, a4, a5, a6, a7, a8,\r
+ a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20);\r
+# endif\r
+#else\r
+# ifdef HAS_snprintf_void\r
+ snprintf((char *)(state->in), size, format, a1, a2, a3, a4, a5, a6, a7, a8,\r
+ a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20);\r
+ len = strlen((char *)(state->in));\r
+# else\r
+ len = snprintf((char *)(state->in), size, format, a1, a2, a3, a4, a5, a6,\r
+ a7, a8, a9, a10, a11, a12, a13, a14, a15, a16, a17, a18,\r
+ a19, a20);\r
+# endif\r
+#endif\r
+\r
+ /* check that printf() results fit in buffer */\r
+ if (len <= 0 || len >= (int)size || state->in[size - 1] != 0)\r
+ return 0;\r
+\r
+ /* update buffer and position, defer compression until needed */\r
+ strm->avail_in = (unsigned)len;\r
+ strm->next_in = state->in;\r
+ state->x.pos += len;\r
+ return len;\r
+}\r
+\r
+#endif\r
+\r
+/* -- see zlib.h -- */\r
+int ZEXPORT gzflush(file, flush)\r
+ gzFile file;\r
+ int flush;\r
+{\r
+ gz_statep state;\r
+\r
+ /* get internal structure */\r
+ if (file == NULL)\r
+ return -1;\r
+ state = (gz_statep)file;\r
+\r
+ /* check that we're writing and that there's no error */\r
+ if (state->mode != GZ_WRITE || state->err != Z_OK)\r
+ return Z_STREAM_ERROR;\r
+\r
+ /* check flush parameter */\r
+ if (flush < 0 || flush > Z_FINISH)\r
+ return Z_STREAM_ERROR;\r
+\r
+ /* check for seek request */\r
+ if (state->seek) {\r
+ state->seek = 0;\r
+ if (gz_zero(state, state->skip) == -1)\r
+ return -1;\r
+ }\r
+\r
+ /* compress remaining data with requested flush */\r
+ gz_comp(state, flush);\r
+ return state->err;\r
+}\r
+\r
+/* -- see zlib.h -- */\r
+int ZEXPORT gzsetparams(file, level, strategy)\r
+ gzFile file;\r
+ int level;\r
+ int strategy;\r
+{\r
+ gz_statep state;\r
+ z_streamp strm;\r
+\r
+ /* get internal structure */\r
+ if (file == NULL)\r
+ return Z_STREAM_ERROR;\r
+ state = (gz_statep)file;\r
+ strm = &(state->strm);\r
+\r
+ /* check that we're writing and that there's no error */\r
+ if (state->mode != GZ_WRITE || state->err != Z_OK)\r
+ return Z_STREAM_ERROR;\r
+\r
+ /* if no change is requested, then do nothing */\r
+ if (level == state->level && strategy == state->strategy)\r
+ return Z_OK;\r
+\r
+ /* check for seek request */\r
+ if (state->seek) {\r
+ state->seek = 0;\r
+ if (gz_zero(state, state->skip) == -1)\r
+ return -1;\r
+ }\r
+\r
+ /* change compression parameters for subsequent input */\r
+ if (state->size) {\r
+ /* flush previous input with previous parameters before changing */\r
+ if (strm->avail_in && gz_comp(state, Z_PARTIAL_FLUSH) == -1)\r
+ return state->err;\r
+ deflateParams(strm, level, strategy);\r
+ }\r
+ state->level = level;\r
+ state->strategy = strategy;\r
+ return Z_OK;\r
+}\r
+\r
+/* -- see zlib.h -- */\r
+int ZEXPORT gzclose_w(file)\r
+ gzFile file;\r
+{\r
+ int ret = Z_OK;\r
+ gz_statep state;\r
+\r
+ /* get internal structure */\r
+ if (file == NULL)\r
+ return Z_STREAM_ERROR;\r
+ state = (gz_statep)file;\r
+\r
+ /* check that we're writing */\r
+ if (state->mode != GZ_WRITE)\r
+ return Z_STREAM_ERROR;\r
+\r
+ /* check for seek request */\r
+ if (state->seek) {\r
+ state->seek = 0;\r
+ if (gz_zero(state, state->skip) == -1)\r
+ ret = state->err;\r
+ }\r
+\r
+ /* flush, free memory, and close file */\r
+ if (gz_comp(state, Z_FINISH) == -1)\r
+ ret = state->err;\r
+ if (state->size) {\r
+ if (!state->direct) {\r
+ (void)deflateEnd(&(state->strm));\r
+ free(state->out);\r
+ }\r
+ free(state->in);\r
+ }\r
+ gz_error(state, Z_OK, NULL);\r
+ free(state->path);\r
+ if (close(state->fd) == -1)\r
+ ret = Z_ERRNO;\r
+ free(state);\r
+ return ret;\r
+}\r
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